Shearing machine



Aug. 2, 1938. GLE|H 2,125,556

' SHEAHING' MACHINE Filed Jan. 29, 1937 FRITZ GLEICH By W, Mv- MM ATTOIMHQ' Patented Aug. 2, 193a 2,125,556

UNITED STATES PATENT OFFICE surname momma Fritz Gleich, Weil-in-the-Dori', near Stuttgart, Germany Application January 29, 1937, Serial No. 123,053

6 Claims. (01. 30-272) The invention relates to mechanically operated Screw threaded bore 20 into which a screw 2| is shears for cutting sheets of metal, cardboard, screwed. The screw has a transverse bore 23 for leather and other materials, the shears being of inserting a key for turning it, and at its lower the kind in which a reciprocating shear blade end it has two lateral flats 22, one or other of coacts with a fixed blade, the reciprocating blade which, after adjustment of the screw, abuts 5 being actuated by mechanism driven by a suitagainst a plate 24 placed against it and held fast able motor, generally an electromotor, which may by the upper screw 19 so that the screw is locked be structurally incorporated with the tool or may (Fig. 6). drive it by meansof a flexible shaft. The arm I4 is fixed to the housing 2 by screws The invention is applicable to portable ma- 25 and pins 26, and is curved at its free end (Fig. 10 chines and also to stationary machines, and is 4) so as to face the blade ll, its end portion having concerned with various improvements in the a recess 21 forming a seat forthe fixed shear blade F driving mechanism, means for fixing and ad- 28, which is held in its seat byabolt 29. The blade justing the blades, and means for lubricating the has a recess 30 accommodating the nut 32 on the parts. bolt, and the shank of the bolt passes through a 5 An' embodiment of the invention is shown in slot 3| in the blade, enabling the blade to be adthe accompanying drawing, in which 'justed. A screw 33 in a horizontal bore in the Fig; 1 is a side elevation of the tool, arm H abuts against the blade at the rear thereof. Fig. 2 being a section, to alarger scale, of the In the modification shown in Figs. '7 and 8 the actuating mechanism, eccentric pin, designated 4 has thereon a bear- 20 Fig. 3 a section on the line IIIHI of Fig. 2, ing 34 supporting a ring 35 flattened at top and and bottom to form two smooth faces 36 in contact Fig. 4 a section on the line IV-IV of Fig. 3. with the wall surfaces 1 of the recess in the Fig. 5 is a side view of a detail of the tool, and slide 5 In the course of the reciprocating move- Fi 6 is a cross-section on the line VI-VI ment of the slide the faces 36 move to and fro 5 of Fig. 5. on the surfaces 1 fairly large bearing surfaces Figs. 7 and 8 are sections corresponding rebeing afforded as compared with the construction Spectively to Figs- 2 d 3 but illustrating a modishown in Figs. 2 and 3, where only linear contact fication of the mechanism. is made between the ring 9 and the surfaces I.

An electromotor I is joined to a tubular hous- The casing of the electrom tor serves as a han- 3o ing 2 and drives a shaft 3 having at its outer dle, current being supplied to the motor by means end an eccentric pin 4 located in this housing. of a cable connected thereto.

In the housing 2 there is a cylindrical slide 5 hav- What I claim as y invention and des re to 58-. ing a lateral recess 6 with fiat walls 1 at top and cur by Letters Patent of the United States bottom. The eccentric pin 4 extends into thi 1. In a hand operable shearing machine the 35 ecess and has upon it a roller bearing a supcombination of a casing serving as a handle, an porting a ring 9 in contact with the wall surface; electromotor in said casing, a driven shaft there- 'I, so that by rotation of the shaft the slide 5 is in, a housing attached to said casing at right anvertically reciprocated. The slide 5 has therein gles thereto and having a cylindrical bore and 40 ducts l5 for lubricant contained in the bore I av 8 fiat guide Surface D r w th t e a 40 in which the slide works. At the top the housing .of said bore, a reciprocatable shear blade holder 2 is closed by a screw cap l1, and by screwing having a cy d P Slidable in a o down this cap the lubricant is forced into the and having outside said bore a flattened part in ducts. contact with said guide surface, said cylindrical 4 At its lower end the slide 5, which is the part of said holder having arecess having two flat holder of one of the shear blades, has an extenwall surfaces in planes perpendicular tothe axis sion III, which carries a shear blade I I. Rotation of said cylindrical part, and the driven shaft havof the slide 5 is prevented by contact of a flat, ing at one end an eccentric pin extending into vertical surface l2 of the extension III with 'corsaid recess, and a ring rotatably mounted on said 5 responding surfaces l3 of the housing 2 and of pin in sliding contact with said flat wall surfaces an arm M fixed to the housing. The shear blade of said recess. II has a vertical slot is and is fixed to the part In a r n machine the c m in 0 a N by two screws l9 passing through this slot. reciprocatable shear blade holder, said holder For readjusting the blade when it has become having a screw threaded bore parallel with its dishortened bv grinding the slide 5 has a vertical, rection of movement, a screw screwed into said bore, and having a fiat lateral surface outside said bore, a shear blade outside said bore, abutting against the end of said screw outside said bore, a plate abutting against said flat lateral surface of said screw and against said blade, and screws whereby said blade is adjustably fixed to said holder, one of said blade fixing screws serving also to fix said plate to said holder.

3. The combination claimed in claim 1, the housing wherein said holder is reciprocatable being open above and a screw cap on said housing for closing the same, the said holder having ducts therein leading from its upper end to the side surfaces thereof and to the said recess.

4. The combination claimed in claim 1, together with an arm fixed to said housing, having a seat for a shear blade, and means for adjusting said shear blade on said seat transversely of the direction of movement of said holder.

5. The combination claimed in claim 1, together with an arm fixed to said housing and having a seat for a shear blade, a shear blade on said seat,

having a recess and a slot, a nut and bolt parallel to the axis of said housing for fixing said blade upon said seat, said nut being located in said recess and said bolt passing through said slot, and a screw'screwed into said arm transversely of the axis of said housing and extending into said recess and abutting against said blade transversely of said bolt.

6. The combination claimed in claim 1, said holder having in its cylindrical part a screw threaded bore parallel with its direction of movement, together with a screw screwed into said here and projecting therefrom laterally of said flattened part of said holder, a slotted shear blade having one side abutting against said flattened part and abutting with its top edge against said screw, and screws passing through the slot in said blade into said flattened part of saidholder, whereby said plate is held against said flattened part.

FRITZ GLEECH 

